Puncture-proof inner casing for pneumatic tires.



T. F. SHIELS & W. R. BOLTER.

PUNGTURE PROOF INNER CASING FOR PNEUMATIC TIRES.

APPLICATION FILED NOV. 9, 1911.

1,032,955. Patented July 16, 1912.

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UNITED srA'rEs PTENT' OFFICE;

rrtomas F. SHIELS AND WILLIS R-AY- BOLTER, or LowELL, MICHIGAN.

rmvorunurnoor INNER CASIKQFOB PNEUMATIC Tr ms.

andlVIL LIs RAY BOLTER, citizens of the United States, residing atLowell, 1n the county-of "Kentand State of Michigan, have inventedcertain new and useful Improvef-of the tire and to being brolren awayment'sin Puncture-Proof Inner Casings for Pneumatic Tires; and we dodeclare the following to be a full, clear, and exact description oftl'ie invention, such as will enable others skilled in the art-to whichit apper" rains to make and use the same.

This invention relates to improvements in inner casings for pneumatictires.

One objectof a casing oft-his character adapted to be placed betw eentheouter and inner tubes be securely held in positionto reduce the strainor pressure of the inner tube against the outer tube and to effectuallyprotect the inner tube .from

puncture. With this and other objects 1n view the invent-ion consists ofcertain novel-features of construction, and the combinationand-arrangement of parts as will be more fully described and claimed. r

In the accompanying drawings; Figurel is a side view of a portion of atire having ournnproved casing applied thereto,- parts tomore clearlyillustrate the casing. F ig. 2 1s a.

the arrangement of cross sectional view through the tire and easing;Fig. 3 is a sectional perspective view of the improved casing-,1,removed from the tire; Fig. e is an enlarged plan view of a portion ofthe casing, parts of the same being broken away and in section toillustrate the construction of the fabric forming the casing; Figrf) isan enlarged sectional view of the fabric as shownin Fig. 4.

Referring more particularly to the drawing, 1 denotes the outer tubeofthe tire and 2 denotes the inner tube. Theltubes 1 and 2 may be of theusual or ofany desired construction and between the, same is arrangedour improved shoe or casing 3 formed of a;

flexible fabric practically puncture proof strip, the edges; 01" whichare secured to me;

talhcrings 4 of substantially triangular form 111 cross =seet1on asshown and prothe rings are arranged in position for bolding the casing.Tlie inucr surface of the rings has a slight transverse curvature andSpecification brretters Intent.- Application filed November $1911 SerialNo. csass'a' THOMAS -F. SHIELS he invention is to provide.

Patented Ju1y16, 1 912} when "said rings are brought together theseinner sides form-a smooth-bearing surface for the'adjacent sideof. theinner tube of the tire.

In the outer sides of rh'nng's ,are forrned right. angular longitudinalrecesses 6 within which are seatedr-theedges 'of the casing,

said edgesbeing firmly, secured inthe re--.

cesses 6 shown.

of the rings ,by-s'crew'sf or' rivets -7 as The depth of the 'recessesfi,"corre sponds tothe thickness of ithe edges of the 2' casing 3- seatedthereon so that when-said edges .are secured to th e =.ring's the' outersurfaces thereof will be fi u sl1 ,;-t h1 1s permit-.1. ting the outerside of the rings and the adjace'nt outer surface of the casingtoi'closely tire as clearly shown in Fig.2 of the drawing. When the rngs andf'cas'ln are thus applied to' the tires, .thecasing W1 1 form ane cient practicalpunctureproof ,coverlng for the inner tube of the,ftire' and will alsoby the inner tube when inflated.

relieve the outer tube from strain or pressure outer layers 8 of canvasand an inner'oanvas layer 9. Between the layers of canvas 8 and thelayers of canvas and cane. The layers of I rubber, however, may bedispensed with if desired and the-layers of canvas stitched or otherwisefirmly secured to the layers of cane or ratan. The casing when formed offabric constructed as "herein shown and described willbe stron durableand p'mctically puncture proo in construction and will be sufiicientlyflexible or liable to freely yield with the movement 0 the tires. Thecasing has 'also been found to-be frictio-nles'srand non-heating."- s

The fabric while herein shown and described a's being arranged to form acasing it is obviousthatt-helfabric may also be embodied in or employedfor relining old tires or for formin blow out patches."

-. From the oregoing description taken in ponnectron withthe-accompanying. drawlogs, the construction and operation of the- "fitthe inner surface-oftheouter-tubebf the i The fabri forming the casing 2oernpriss 4 principle or sacrificing any of the advanof an outer layerof canvas, layers of woven 20 tagcs of the invention as claimed. i,cane, an inner layer of canvas and layer f Having thus described ourinvention,, rubber arranged between said layers of canwhat we claim is;vas and mine, said layers being vulcanized 5 1. An inner casing forpneumatic tires together to form the fabric, and rings havcomprising apair of rings hiiving upper ing outer an ular recesses receiving the 25(lg es curved toconform to the inner tube edges of the fa ric flush withtheir outer sir when inflated?- and flat -closely fitting verti- Su fa hW p d P d cal engaging surfaces, and having in their within the O r e nt0 l an s p- 10'0uter side surfaces right angular notches port the innertube to form the complete or recesses, and a strip of flexible puncturetire. 30'

proof fabric having its edges secured in In testimony whereof we havehereunto the notches of said rings whereby the fabric set-tour hands inpresence of two subscribis flush with said outer side surfaces and isiug Witnesses.

15 held in position between the inner and outer THOMAS F. SHIELS.

tubes of the tire, supporting the inflated YVILLIS RAY BOLTER. innertube. A Witnesses:

2. An inner casing for pneumatic tires .R. E. SPRINGETT, comprising apuncture proof fabric formed ALMA FLQGAUS.

. v Copies of this patent may be obtained or five cents each, byaddressing the Commissioner or ratents.

Washington, D. 03"

